refactor temp.rs

src/temp.rs

@@ -426,11 +426,7 @@ pub fn cleanup_usb_devices(ctx: &mut *mut libusb_context, devices: &mut Vec<Temp
 }
 
 pub fn get_temp_r() -> String {
-    let mut ctx: libusb_context;
-
-    unsafe {
-        ctx = std::mem::zeroed();
-    }
+    let mut ctx: libusb_context = unsafe { std::mem::zeroed() };
     let mut ctx = &mut ctx as *mut _ as *mut libusb_context;
 
     let mut answer: &mut [u8; 100] = &mut [0; 100];